package com.tct.worktimeboard.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Configuration;

/**
 * @author liyongkui
 * @date 2020/8/24 15:25
 */
@Configuration
public class SpringContextUtil implements ApplicationContextAware {

    /**
     * Spring应用上下文环境
     */
    private static ApplicationContext applicationContext;

    /**
     * 实现ApplicationContextAware接口的回调方法。设置上下文环境
     *
     * @param applicationContext 上下文
     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) {
        SpringContextUtil.applicationContext = applicationContext;
    }

    /**
     * @return ApplicationContext
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 获取对象
     *
     * @param name bean name
     * @return Object
     * @throws BeansException exception
     */
    public static Object getBean(String name) throws BeansException {
        return applicationContext.getBean(name);
    }

    public static <T> T getBean(Class<T> requiredType) {
        assertApplicationContext();
        return applicationContext.getBean(requiredType);
    }
    private static void assertApplicationContext() {
        if (SpringContextUtil.applicationContext == null) {
            throw new RuntimeException("applicaitonContext属性为null,请检查是否注入了SpringContextHolder!");
        }
    }

}